Synthesis of Arrayed, TiO₂ Needlelike Nanostructures via a Polystyrene-block-poly(4-vinylpyridine) Diblock Copolymer Template

Abstract

Arrayed, needlelike nanostructures of rutile phase crystal TiO2 were grown on a Si substrate containing TiO2 seeds prepared through a thin polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) diblock copolymer template. The morphology of the deposited TiO2 nanostructures was characterized by field-emission scanning electron microscopy, X-ray diffraction, and transmission electron microscopy (TEM). By using TiO2 seeds prepared from their diblock copolymer PS-b-P4VP template, we fabricated arrayed, needlelike rutile TiO2 nanostructures with variable spatial positions and densities. The distance between two TiO2 needle bunches (120 and 160 nm) could be controlled using block copolymer templates with different molecular weights.

Effect of the Orientation of CdSe Nanorods on the Electron Mobility of CdSe/P4VP Nanodomains Self‐Assembled within a Poly(styrene‐b‐4‐vinylpyridine) Diblock Copolymer Thin Film

“…Block copolymers can also be used as nanoreactors for the synthesis of nanomaterials. For example, quasi‐regular arrays of Au clusters5a and TiO 2 needles6c have been obtained through the selective sequestration of metal ions into one block of poly(styrene‐ b ‐vinylpyridine).…”

Fabrication of Magnetic Co/Pt Nanodots Utilizing Filled Diblock Copolymers

“…To tune the diameter as well as the spacing of the particles the organic spheres are shrunk in a plasma etching step before structure transfer [60][61][62]. A similar technique uses diblock copolymer micelles as selfassembling units which are filled with magnetic or nonmagnetic material [28][29][30][63][64][65]. Magnetic dot arrays can be directly created when magnetic core material is used and the organic shell is removed in oxygen plasma [28][29][30].…”

Structural and Optical Properties of Glancing Angle Deposited TiO2 Nanowires Array

“…TiO 2 NW growth has been reported based on vapor-liquid-solid (VLS) techniques at very high growth temperatures. [9][10][11] The CVD 12 and MOCVD 13 has been employed for the synthesis of TiO 2 NWs. Very recently, TiO 2 NWs using hydrothermal 14 and solvothermal 15 methods were synthesized on FTO substrate, and attempts to grow NWs on glass or silicon substrates were failed.…”